odd ball question...no HS or block...how cold?

[Shalfi]

im not a power overclocker...im happy with normal performance, but I would like to do a cold case mod where the cpu has no HS/fan or waterblock, just the cpu in the socket.

Just how cold would the case have to be to operate like this?

[lalPOOO]

Wouldn't work. Doesn't matter how cold the case was, the air just can't disapate the heat fast enough. It would depend on the chip though I suppose. Something like a p3 or old celeron might be able to do it if the case was at -10 or -20. Just a guess really though.

[DBlue135]

Yeah, any modern CPU that one tries to operate without a heat sink will burst into flames within the first 5 seconds of being on. I know from experience. I've even seen an article where a guy tried to submerge in mineral oil and do direct die cooling and even that didn't work. The computer turned on for about 2 seconds and then shutdown due to heat.

Also if you DID get your case cold enough to do it you'd have a hell of a problem with frost forming on the outside and most likely in important places like hard drives and optical drives.

[dippyskoodlez]

Yeah, any modern CPU that one tries to operate without a heat sink will burst into flames within the first 5 seconds of being on. I know from experience. I've even seen an article where a guy tried to submerge in mineral oil and do direct die cooling and even that didn't work. The computer turned on for about 2 seconds and then shutdown due to heat.

Also if you DID get your case cold enough to do it you'd have a hell of a problem with frost forming on the outside and most likely in important places like hard drives and optical drives.


Unless you underclocked it like crazy..

say an athlon FX at 500mhz or something.... :stick: along with a nice voltage reduction... but a lot of mobos have trouble with <1.2v afaik. (with an axp, atleast. a64's may be different.)

[Tyrou]

with a underclocked/undervolted dothan, you can run heatsink-less, x86-secret.com did it, so with a chilled air, you might run it around 1.5Ghz :D

[DBlue135]

wow, that's rather incredable.

[Tyrou]

they ran the P-M at 800Mhz and 0.6V if I remember well, whith such settings, it's should not dissipate more than 5W :D

[craig588]

I found someone with a PIII933 running without a HS. Those coppermines barely put out any heat, like 20 watts.

You can run a 486 without a HS too, but it will be very hot and occasionally crash from the heat. I don't belive 386s and below were even speced to use HSs.

There are specialized CPUs that won't work in a normal computer that are mainly used in small electronic devices that put out virtually no heat, Z80, ARMx, MIPS, 6502, 68000, SPC700 and the list goes on for a quite a while.

[Bloody_Sorcerer]

all the VIA chips put out virtually no heat...
also, modern processors don't "burst into flames"... both intels and AMDs have built in thermal sensors and shutdown beyond a builtin thresholds. For athlon 64s, the core shuts itself down above something like 70oC, as for pentium 4s, they automatically throttle (don't know much beyond that)
actually, this probably *could* work... Take a nice steady stream of liquid nitrogen, divert it onto the processor....

[dippyskoodlez]

If anything, take a super giant super big heatsink and take the fan off.. 1.1v at 800mhz on an a64 doesnt even get warm... ;)